Cooking-stove



R. L. MARTIN.

COOKING STOVE. APPLICATION FILED JULY 1.19:9.

1,392,956, Patente& 00a 11, 1921.

2 SHEETS-SHEET 1.

attoamu R. L. MARTIN.

= COOKING STOVE.

APPLICATION FILED JULY 1,1919.

1,392,956. Patented Oct. 11, 1921.

2 SHEETS-SHEET 2.

ROBERT L. MARTIN,

OF GOAL-A, FLORIDA.

COOKINGfiTGVE.

Application filed July 1,

To all whom it may camera.

Be it known that 1, ROBERT L. MARTIN, a citizen of the United States, residin at @cala, in the county of Marion and tate of Florida, have invented new and useful Improvements in Cooking-Stoves, of which the following is a specification.

My present invention relates to improvements in cooking stoves and the primary object is to provide a novel and improved stove which is capable of being used satisfactorily for cooking food while the exhaust gases from an internal combustion engine are employed as the source of heat.

According to the present invention, the hot exhaust gases from the engine are caused to pass through a closed coil or other suitable form of piping contained within the stove so that the heat is absorbed from such gases through the walls of the coil or piping, and hence the gases or soot accompanying them cannot reach the cooking chamber of the stove to either contaminate the food or to smut or blaclren the cooking vessels. Furthermore, the stove is so constructed that the heat will be distributed uniformly to the cooking vessels, the heat will be retained within the stove after the hot gases have ceased to pass through the heating coil, thus continuing the cooking operation after the source of heat has been cut oft from the stove, and moreover, means is provided to edectively prevent spilling of the food from the cooking vessels when the stove is carried by an automobile and the cooking operation is carried on while the automobile is in "tranart.

To these and other ends the invention consists in certain improvements and combinations and arrangements of parts all as will be hereinafter more fully described, the features of novelty being pointed out particularly in the claims at the end of the specification.

in the accompanying drawings Figure l is a side elevation partly in section showin an automobile provided with an exhaust heated cooking stove constructed in accordance with the present invention.

lFi 2 is a collective view showing in perspectlve the body or casing of the stove, the heat distributing plate and the lid or cover which serves to close the stove and also serves to retain the cooking vessels and the lids in proper position within the stove.

Specification of Letters Patent.

1919. Serial No. 307,993.

Simllar parts are designated by the saine reference characters in the several views.

Cooking stoves embodying the present invention are capable of use generally where it is desirable or necessary to cook foods by heat denved from the hot exhaust gases from an internal combustion engine or byan equivalent heating medium. It is articularly suitable "for use upon automo ilm where it is desirable to carry therewith means for cooking or heating foods by heat dtillved from the exhaust gases of the engine of the automobile, the cooking stove provided by the present invention being ca: pable of cooking foods satisfactorily while the automobile is in transit. It is to be understood, however, that the invention is not restricted to any one particular use and t will also be understood that the invention is not restricted to the precise construction shown, as the stove may be used in situations other than that shown and also constructions equivalent to the construction shown are contemplated and will be included within the scope of the claims.

In the present instance, 1 designates a part or the chassis or an automobile provided with a body 2 which is suitably constructed and arranged interiorly to accommodate a cooking stove. The interior construction and arrangement of the body is preferably like that shown and described in my application filed of even date herewith.

or convenience and economy of space, the stove constitutes a part or is constituted by a part of the base. 3 of one of the seats- 4:, although it will be understood that the stove may be constructed independently of the seats or other parts of the vehicle. 5 represents conventionally an internal combustion engine of the kind commonly used for the propulsion of automobiles, the engine 5 in the instance shown serving for the propulsion of the vehicle, part of which is illustrated. 6 represents the exhaust manifold Patented Oct. 11, 1921. l

till

which, as is used in engines of this type, is 7 arranged to receive theburned or ex aust gases from the diilerent cylinders of the engine, the gases being discharged from the exhaust manifold into an exhaust pipe 7 and the gases may pass through this exhaust pipe, thence through a mufiler 8, as is usual,

and finally escape to the atmosphere. When i the exhaust gases of the engine are utilized to supply heat to the stove, such gases are 13 which may be made of wood diverted from the main exhaust pipe 7 through a branch pipe 9 and after circulating through a coil or other heat trans= ferring medium within the stove 10, these gases return to the exhaust pipe 7 through a second branch pipe 11. A suitable valve 12 may be located at the junction of the branch pipe 9 with the exhaust pipe 7 to direct the exhaust gases from the engine either to the stove or to the muffler as may be" desired, this valve being preferably provided with means similar to that provided for muffler cut out valves by which it may be operated or adjusted from the floor or interior of the body.

The stove consists preferably of. a casing and of any desired shape and dimensions. The casing, however, is constructed for heat insulation in order that it will retain within the cooking chamber of the stove a sufficient amount of heat to continue the cooking and operate for a prolonged period after the supply of heat to the stove has been discontinued, the stove then acting, in effect, as a so-called tireless cooker; This desired insulation'of the stove casing may be attained in different ways. As shown, the casing 13 is lined interiorly with sheet asbestos 14: of suitable thickness and the asbestos lining is covered interiorly with a linin of tin or other sheet metal 15. The heating coil 10, through which the exhaust gases of the engine circulate, may be constructed in different ways. Preferably, and as shown, this heating device 10 is made up of a suitable number of pipes 16 arranged parallel or substantially so and lying in the same plane or on the bottom of the stove casing, the ends of the pipes being connected in alternate relation by elbows or return bends 17. All joints between the pipes and the elbows are made tight in order to avoid leakage of the exhaust gases .into the interior ofthe stove. The branch pipe 9 introduces the exhaust gases into the inlet end of the coil or heating device 10 while the branch pipe 11 receives the exhaust gases after they have traversed the coil or heatingdevice 10, these spent gases being returned by the branch pipe 11 to the exhaust pipe 7. By employing a coil or heating device in the form of return bend pipes or tubes, the hot exhaust gases are compelled to follow a sinuous course of considerable length affording ample opportunity for the transfer of heat from the exhaust gases to the interior of the stove or the cooking vessels contained therein. In order to distribute the heat from the coil or heating device 10 evenly to the'vessels containing foods to be cooked and to also provide a suitable support for the cooking. vessels, a plate 18, which is preferably perforated or foraminous, is placed on top of the relatively fiat coil or heating device 10, this plate providing a fiat even surface for the support of the cooking vessels and it also acting to equalize the heat which it receives from the convolutions or pipes ofthe coil or heating device and which it transfers to the cooking vessels resting thereon. The stove is also provided with a lid or cover which serves to close the top of the cooking chamher. The lid 19 as shownis preferably rabbeted to lit the correspondingly shaped top edge of'the casing 13 so that lateral displacement of the lid is avoided and a tight joint is obtained between the lid and the casing. The lid is also preferably constructed for heat insulation, it being shown as provided with a lining or covering ofasbestos 20 on its under side and a .sheet of tin or other sheet metal 21 covers the asbestos. ,When the stove is used for cooking purposes upon an automobile, it is necessary or at least desirable to holdthe lids upon the vessels and to hold the vessels down upon the supporting plate 18 in order to avoid spilling of the contents of the vessels and vibration or rattling of the lids upon the vessels or the vessels upon the plate 18. For this purpose the removable lid 19 of the stove is provided with a suitable number of compression springs 22 which'are appropriately spaced on its under side and extend downwardly therefrom, these springs being so constructed, located and proportioned-that when the lid 19 is applied to the casing of the stove, the springs will bear down upon the lids of the respective vessels beneath them with a pressure sufficient to retain the lids firmly on the vessels and to retain the-vessels down upon the supporting plate 18.

An exhaust-heated cooking stove constructed in accordance with the prevent invention is capable of efficiently cooking food without possibility of contamination of the food by the poisonous and injurious constituents of the exhaust gases and also without smutting or blackening the cooking vessels by the soot carried by such exhaust gases, because the exhaust gases are confined within the coil or equivalent heatin device and hence such gases cannot reach t e cooking chamber or the cooking vessels therein; on the contrary, the cooking vessels are in a chamber which may contain pure air, in consequence of which the cooked food will be wholesome. Efficiency in the cooking operation is attained by passing the hot exhaust gases through a relatively long coil or conduit of fiat or substantially fiat form and placing the cooking vessels on a heat conducting and distributin plate which rests directly on the coil. T e heat-insulating walls of the stove also increase the efficiency of the, cooking'operation by preventing loss of heat and, furthermore, by

confining the heat within the stove, the cooking operationis prolonged for a considerto the stove has been cut ofi.

What is claimed is :Z

An exhaust gas heated cooking stove for automobiles comprising a closed chamber to entirely inclose cooking vessels, said chamber having a movable lid to cover said chamber and to afiord access to the interior thereof, a flat exhaust gas heated coil located in the bottom of said chamber, a heat distlibuting plate resting on the top of said coil and serving as a support-for the cooking vessels, and means to bear yieldingly on the cooking vessels in said chamber to hold said vessels down on said plate and to hold said 15 plate down on the coil.

In testimony whereof 'I have hereunto set my hand in presence of two subscribing witnesses.

ROBERT L. MARTIN.

Witnesses: Y

A. E. GERIG, D. A. PILLANs. 

